With　the　continuous　development　of　graphene　in　the　field　of　electronic　devices,　it　is　necessary　to　further　develop　wafer-scale　high-quality　graphene　preparation　technique.　A　patterning　preparation　technique　for　2-inch　wafer-scale　transfer-free　graphene　is　reported　in　this　paper,　which　is　innovatively　applicable　to　a　variety　of　substrates.　Based　on　this　technique,　a　2-inch　wafer-scale　light-emitting　diode　(LED)　chip　with　graphene　transparent　electrodes　was　fabricated.　The　results　show　that　the　prepared　graphene　has　high　quality　and　uniformity,　and　plays　a　good　role　in　improving　electrode　contact　and　current　spreading.　In　addition,　the　LEDs　exhibit　excellent　electrical　and　optical　performance　and　have　a　good　yield.　This　wafer-scale　graphene　preparation　technique　avoids　the　damage　to　graphene　caused　by　the　transfer　process　and　the　patterning　process,　which　is　scalable　and　suitable　for　real　applications.　©　The　Author(s)　2025.